vtkRenderWindowInteractor: Sanitize GetKeySym usages in VTK

Charts/Core/vtkChartXYZ.cxx

Charts/Core/vtkControlPointsItem.cxx

...x/TestHyperTreeGridTernary3DGeometryLargeMaterialBits.cxx

Interaction/Style/vtkInteractorStyleImage.cxx

Interaction/Style/vtkInteractorStyleRubberBandPick.cxx

Interaction/Style/vtkInteractorStyleSwitch.cxx

Interaction/Style/vtkInteractorStyleTerrain.cxx

Interaction/Style/vtkParallelCoordinatesInteractorStyle.cxx

...esting/Cxx/TestImplicitPlaneWidget2LockNormalToCamera.cxx

...tion/Widgets/Testing/Cxx/TestPickingManagerSeedWidget.cxx

...ion/Widgets/Testing/Cxx/TestPickingManagerSeedWidget2.cxx

...raction/Widgets/Testing/Cxx/TestPickingManagerWidgets.cxx

Interaction/Widgets/vtkBoxWidget2.cxx

Interaction/Widgets/vtkCamera3DWidget.cxx

Interaction/Widgets/vtkCameraPathWidget.cxx

Interaction/Widgets/vtkCoordinateFrameWidget.cxx

Interaction/Widgets/vtkDisplaySizedImplicitPlaneWidget.cxx

Interaction/Widgets/vtkHandleWidget.cxx

Interaction/Widgets/vtkImagePlaneWidget.cxx

Interaction/Widgets/vtkImplicitCylinderWidget.cxx